by
Charles, Randall I.

Answer

175% increase

Work Step by Step

The new number is higher than the original number, so we use the equation for percent increase. The equation for percent increase is the following: $(\frac{new amount - original amount}{original amount})\times100$ Thus, we plug in the numbers to find: $(\frac{5.5-2}{2})\times100\approx175$%